在 Python 中讓一個切比雪夫級數減去另一個級數
要讓一個切比雪夫級數減去另一個級數,可以使用 Python Numpy 中的 polynomial.chebyshev.chebsub() 方法。此方法返回一個切比雪夫級數係數陣列,表示它們的差值。返回兩個切比雪夫級數 c1 - c2 的差值。係數序列從最低次項到最高次項,即 [1,2,3] 表示級數 T_0 + 2*T_1 + 3*T_2。引數 c1 和 c2 是切比雪夫級數係數的一維陣列,從低到高排列。
步驟
首先,匯入所需的庫 −
import numpy as np from numpy.polynomial import chebyshev as C
建立切比雪夫級數係數的一維陣列 −
c1 = np.array([1,2,3]) c2 = np.array([3,2,1])
顯示係數陣列 −
print("Array1...\n",c1) print("\nArray2...\n",c2)
顯示資料型別 −
print("\nArray1 datatype...\n",c1.dtype) print("\nArray2 datatype...\n",c2.dtype)
檢查兩個陣列的維度 −
print("\nDimensions of Array1...\n",c1.ndim) print("\nDimensions of Array2...\n",c2.ndim)
檢查兩個陣列的形狀 −
print("\nShape of Array1...\n",c1.shape) print("\nShape of Array2...\n",c2.shape)
要讓一個切比雪夫級數減去另一個級數,可以使用 Python 中的 polynomial.chebyshev.chebsub() 方法。此方法返回一個切比雪夫級數係數陣列,表示它們的差 −
print("\nResult (subtraction)....\n",C.chebsub(c1,c2))
示例
import numpy as np from numpy.polynomial import chebyshev as C # Create 1-D arrays of Chebyshev series coefficients c1 = np.array([1,2,3]) c2 = np.array([3,2,1]) # Display the arrays of coefficients print("Array1...\n",c1) print("\nArray2...\n",c2) # Display the datatype print("\nArray1 datatype...\n",c1.dtype) print("\nArray2 datatype...\n",c2.dtype) # Check the Dimensions of both the arrays print("\nDimensions of Array1...\n",c1.ndim) print("\nDimensions of Array2...\n",c2.ndim) # Check the Shape of both the arrays print("\nShape of Array1...\n",c1.shape) print("\nShape of Array2...\n",c2.shape) # To subtracr one Chebyshev series to another, use the polynomial.chebyshev.chebsub() method in Python Numpy print("\nResult (subtraction)....\n",C.chebsub(c1,c2))
輸出
Array1... [1 2 3] Array2... [3 2 1] Array1 datatype... int64 Array2 datatype... int64 Dimensions of Array1... 1 Dimensions of Array2... 1 Shape of Array1... (3,) Shape of Array2... (3,) Result (subtraction).... [-2. 0. 2.]
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